Use Bollinger Bands in Strategy

[Revazi123]

Hi there,

I am trying to use Bollinger Bands in my Strategy but I got error: "Indicator 'Std. dev.': Error on calling 'OnBarUpdate' method on bar 1169: Object reference not set to an instance of an object.".
After that I tried to create simple example using strategy builder and I still get this error: "Indicator 'Std. dev.': Error on calling 'OnBarUpdate' method on bar 1169: Object reference not set to an instance of an object.".
I will attach simple code with should work but somehow its not working. Code:

#region Using declarations
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Input;
using System.Windows.Media;
using System.Xml.Serialization;
using NinjaTrader.Cbi;
using NinjaTrader.Gui;
using NinjaTrader.Gui.Chart;
using NinjaTrader.Gui.SuperDom;
using NinjaTrader.Gui.Tools;
using NinjaTrader.Data;
using NinjaTrader.NinjaScript;
using NinjaTrader.Core.FloatingPoint;
using NinjaTrader.NinjaScript.Indicators;
using NinjaTrader.NinjaScript.DrawingTools;
#endregion

//This namespace holds Strategies in this folder and is required. Do not change it.
namespace NinjaTrader.NinjaScript.Strategies
{
public class MyCustomStrategyBollingerBandsTest : Strategy
{
private Bollinger Bollinger1;

protected override void OnStateChange()
{
if (State == State.SetDefaults)
{
Description = @"Enter the description for your new custom Strategy here.";
Name = "MyCustomStrategyBollingerBandsTest";
Calculate = Calculate.OnEachTick;
EntriesPerDirection = 1;
EntryHandling = EntryHandling.AllEntries;
IsExitOnSessionCloseStrategy = true;
ExitOnSessionCloseSeconds = 30;
IsFillLimitOnTouch = false;
MaximumBarsLookBack = MaximumBarsLookBack.TwoHundredFiftySix;
OrderFillResolution = OrderFillResolution.Standard;
Slippage = 0;
StartBehavior = StartBehavior.WaitUntilFlat;
TimeInForce = TimeInForce.Gtc;
TraceOrders = false;
RealtimeErrorHandling = RealtimeErrorHandling.StopCancelClose;
StopTargetHandling = StopTargetHandling.PerEntryExecution;
BarsRequiredToTrade = 20;
// Disable this property for performance gains in Strategy Analyzer optimizations
// See the Help Guide for additional information
IsInstantiatedOnEachOptimizationIteration = true;
}
else if (State == State.Configure)
{
}
else if (State == State.DataLoaded)
{
Bollinger1 = Bollinger(Close, 2, 14);
Bollinger1.Plots[0].Brush = Brushes.Goldenrod;
Bollinger1.Plots[1].Brush = Brushes.Goldenrod;
Bollinger1.Plots[2].Brush = Brushes.Goldenrod;
AddChartIndicator(Bollinger1);
}
}

protected override void OnBarUpdate()
{
if (BarsInProgress != 0)
return;

if (CurrentBars[0] < 1)
return;

// Set 1
if (CrossAbove(Close, Bollinger1.Upper, 1))
{
ExitShort(Convert.ToInt32(DefaultQuantity), "", "");
EnterLong(Convert.ToInt32(DefaultQuantity), "");
}

// Set 2
if (CrossBelow(Close, Bollinger1.Lower, 1))
{
ExitLong(Convert.ToInt32(DefaultQuantity), "", "");
EnterShort(Convert.ToInt32(DefaultQuantity), "");
}

}
}
}

I am testing bots in market reply.
Waiting for your reply. Thanks

[NinjaTrader_ChelseaB]

Hello Revazi123,

To export a NinjaTrader 8 NinjaScript so this can be shared and imported by the recipient do the following:

1. Click Tools -> Export -> NinjaScript...
2. Click the 'add' link -> check the box(es) for the script(s) and reference(s) you want to include
3. Click the 'Export' button
4. Enter a unique name for the file in the value for 'File name:'
5. Choose a save location -> click Save
6. Click OK to clear the export location message

By default your exported file will be in the following location:

• (My) Documents/NinjaTrader 8/bin/Custom/ExportNinjaScript/<export_file_name.zip>

Below is a link to the help guide on Exporting NinjaScripts.
http://ninjatrader.com/support/helpG...-us/export.htm


I've tested this on a 1 minute ES 03-21 chart and was not able to reproduce.

https://drive.google.com/file/d/1e4cP0ADda_NBQzTfOhSiWHCInp7L_sFz/view?usp=drivesdk

[Revazi123]

Hello ChelseaB,

I am getting this issue in market reply. I will attach video where I am demonstrating it. Code is correct I am sure as it is generated from StrategyBuilder.
Please check video:

https://drive.google.com/file/d/1VJv4Zniy6TtzgpBN0ENev4IipyrhvbaN/view?usp=sharing

Waiting for your reply. Thanks

[Revazi123]

Hi again,

I even checked default SampleMACrossOver strategy and that one also gets errors while trying to use it in market reply. I will attach screenshot so you can see errors.
So its seems that problem is with market reply but I am able to test in market reply other strategies.

Waiting for your reply. Thanks

[NinjaTrader_ChelseaB]

Hello Revazi123,

There may be an issue with the installation.

Please run the repair from the installer.

https://ninjatrader.com/PlatformDirect

[Revazi123]

Hello ChelseaB,

I have reinstalled NT8 but I am getting same errors.

Waiting for your reply. Thanks

[NinjaTrader_ChelseaB]

Hello Revazi123,

Please send an email to platformsupport [at] ninjatrader [dot] com so that we may investigate on your end.
(corrected)

[Revazi123]

Hello ChelseaB,

That email address doesn't exists:

[NinjaTrader_ChelseaB]

Hello Revazi123,

Apologies, there is a typo in that address. I've corrected it.

Also, below is a link to the Contact Us page.

https://ninjatrader.com/ContactUs